Characterization of Apatite from Human Teeth via XRD, FT-IR and TGA Techniques

Piyapong Pankaew; Ekachai Hoonnivathana; Supphadate Sujinnapram; Kheamrutai Thamaphat; Pichet Limsuwan; Kittisakchai Naemchanthara

doi:10.4028/www.scientific.net/AMR.506.90

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 506Characterization of Apatite from Human Teeth via...

Characterization of Apatite from Human Teeth via XRD, FT-IR and TGA Techniques

Abstract:

Human teeth (HT) are natural composites which consist of nanohydroxyapatite (HAp) arranged in lamellae and bound to collagen. In present study, prepared HT powders with different ages were characterized by X-Ray Diffraction (XRD), Fourier transform infrared (FT-IR) and thermogravimetric anlysis (TGA) techniques. HT at age ranges of 1-10, 11-20, 21-30, 31-40, 41-50 and 51-60 years old were selected for tests. To prepare samples, human teeth were washed in boiling water for 1 h and left in 1 M KOH solution for 6 h to remove any organic material. After HT samples were cleaned with ultrasonic in ethanol, they were then finely grounded using agate mortar. The results from XRD indicate that the major diffraction peaks of all samples with different ages were very closely identified to that of stoichiometric HAp. All HT powders were found to be nanocrystalline structure. Furthermore, it was found that the decrease in HAp crystallinity seem to increase with higher age of 31-40 years old. To investigate chemical structure confirmed by FT-IR, All HT powders showed the band positions and function groups, which are similar to that of HAp. group found in chemical structure indicates the structure of carbonated apatite. TGA results were found that the increase of weight loss seem to increase with higher age.